Dude, my hips feel tight, especially when I squat. What do I do about THAT?

Short answer: MOBILITY.

Long answer: More MOBILITY. You gotta stretch that shit out, y'all. Some of you are runners. Some of you are cyclists. A whole lotta us are SITTERS. That all leads to tight hip flexors. So, whatcha gonna do? You can't call the Ghostbusters.